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What are isobars ? Explain with an examp...

What are isobars ? Explain with an example.

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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
  1. Hydrogen has three isotopes written as : .(1)^(1)H,.(1)^(2)H,.(1)^(3...

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  2. Given that the percentage abundance of the isotope .(10)^(20)N is 90 %...

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  3. What are isobars ? Explain with an example.

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  4. For the symbol H,D and T tabulate three sub-atomic particles found in ...

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  5. An element has Z = 7. What is the valency of the element ? Also name t...

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  6. (a) What are valence electrons ? Where are valence electrons situated ...

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  7. (a) What are isotopes ? Explain by giving an example (b) Give one si...

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  8. (a) What are radioactive isotopes ? Give two examples of radioactive i...

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  9. (a) Define valency of an element. What valency will be shown by an ele...

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  10. The mass number of two atoms X and Y is the same (40 each) but their a...

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  11. Which of the following statement is correct about the atom of an eleme...

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  12. There are two species represented as ""^(35)Cl and ""^(37)Cl. Which of...

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  13. The radioactive isotope used in the treatment of cancer is :

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  14. Elements with valency 1 are

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  15. In a sample of ethyl ethanote (CH(3)COOC(2)H(5)) the two oxygen atoms ...

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  16. Which of the following elements does not exhibit electrovalency ?

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  17. The number of valence electrons in a graphite atom is :

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  18. The atomic numbers of four elements A,B,C and D are 12,13,15 and 3 res...

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  19. The number of valence electrons in a sulphide ion, S^(2-) is :

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  20. For an element, Z = 9. The valency of this element will be :

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